Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932378Ab2BNLpk (ORCPT ); Tue, 14 Feb 2012 06:45:40 -0500 Received: from arkanian.console-pimps.org ([212.110.184.194]:57855 "EHLO arkanian.console-pimps.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932336Ab2BNLoA (ORCPT ); Tue, 14 Feb 2012 06:44:00 -0500 From: Matt Fleming To: linux-arch@vger.kernel.org Cc: Oleg Nesterov , Andrew Morton , linux-kernel@vger.kernel.org, Matt Fleming , Richard Weinberger , user-mode-linux-devel@lists.sourceforge.net Subject: [PATCH 35/40] um: Use set_current_blocked() and block_sigmask() Date: Tue, 14 Feb 2012 11:41:08 +0000 Message-Id: <1329219673-28711-36-git-send-email-matt@console-pimps.org> X-Mailer: git-send-email 1.7.4.4 In-Reply-To: <1329219673-28711-1-git-send-email-matt@console-pimps.org> References: <1329219673-28711-1-git-send-email-matt@console-pimps.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 2347 Lines: 70 From: Matt Fleming As described in e6fa16ab ("signal: sigprocmask() should do retarget_shared_pending()") the modification of current->blocked is incorrect as we need to check whether the signal we're about to block is pending in the shared queue. Also, use the new helper function introduced in commit 5e6292c0f28f ("signal: add block_sigmask() for adding sigmask to current->blocked") which centralises the code for updating current->blocked after successfully delivering a signal and reduces the amount of duplicate code across architectures. In the past some architectures got this code wrong, so using this helper function should stop that from happening again. Cc: Oleg Nesterov Cc: Richard Weinberger Cc: user-mode-linux-devel@lists.sourceforge.net Signed-off-by: Matt Fleming --- arch/um/kernel/signal.c | 20 ++++++-------------- 1 files changed, 6 insertions(+), 14 deletions(-) diff --git a/arch/um/kernel/signal.c b/arch/um/kernel/signal.c index 8382e0b..fb12f4c 100644 --- a/arch/um/kernel/signal.c +++ b/arch/um/kernel/signal.c @@ -67,15 +67,8 @@ static int handle_signal(struct pt_regs *regs, unsigned long signr, if (err) force_sigsegv(signr, current); - else { - spin_lock_irq(¤t->sighand->siglock); - sigorsets(¤t->blocked, ¤t->blocked, - &ka->sa.sa_mask); - if (!(ka->sa.sa_flags & SA_NODEFER)) - sigaddset(¤t->blocked, signr); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); - } + else + block_sigmask(ka, signr); return err; } @@ -158,12 +151,11 @@ int do_signal(void) */ long sys_sigsuspend(int history0, int history1, old_sigset_t mask) { + sigset_t blocked; + mask &= _BLOCKABLE; - spin_lock_irq(¤t->sighand->siglock); - current->saved_sigmask = current->blocked; - siginitset(¤t->blocked, mask); - recalc_sigpending(); - spin_unlock_irq(¤t->sighand->siglock); + siginitset(&blocked, mask); + set_current_blocked(&blocked); current->state = TASK_INTERRUPTIBLE; schedule(); -- 1.7.4.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/